You thought that H had issues when you asked him to put up the lights. What do you think his reaction may be when you ask him to go to retrouvaille?
^^ is a little facetious, I know, but what has made you think/hope he would agree to this?
Can you write down a list of behaviours that lead you to believe he is ready for retrouvaille?
Holiday time is not easy. I remember last year when H had OW, they spent Christmas morning together. H said he would be by at noon to pick up kids. Came 2:30, no text, no apology. While things are different this year, I am still wary. And I realize I am. I love H but if he were to say I love you and want to come home, I would really have to think about it and what I wanted in order to make that happen.
So if I am unsure and I am the LBS, I can only imagine what the WAS feels.